Write--> "Letter" or "Other Document" is EXTREMELY SLOW to initialize

I upgraded from ACT 6 to 10 recently. While using 6, I could compose a letter via "Write" --> "Letter" almost instantly. Now with 10, it takes almost a minute to get my document open. I used MS Word 2003 as my editor in ACT 6. Now I use Word 2007 with ACT 10.

Currently I watch the "initializing mail merge" window for at least a minute before my document opens... and I have a very fast pc.